You may already be using this, but one very useful piece of software that came out last week at the BlackBerry World is Unsubscribe for BlackBerry, an app that lets you get rid of your unwanted email from mass mailing list, commercial email known as Bacon. When you see a spam email message, you hit theUnsubscribe button, that unwanted email is sent to Unsubscribe's network engine, that engine will not only block the email but also remove your information from the source. It not only saves your time on researching the senders but also helps avoid traps like using built-in unsubscribe button to capture your info. This service will become increasingly useful on mobile platforms where time and data cost more than on desktop machines.

Unsubscribe is free for those who only need to unsub 5 emails per month, and costs $2.95/mon, $19.95/year and $150/lifetime.

Here is more info on Unsubscribe for BlackBerry:

Once installed, an Unsubscribe.com option will appear in the Blackberry email menu below the delete option. When Unsubscribe.com is selected for an unwanted email from either the main inbox or individual message view, a screen will appear that informs the user they are ?Unsubscribing,? while the Unsubscribe.com App deletes the email and unsubscribes the user?s email address from the mailing list that generated the unwanted email. For further productivity and traveling convenience, Blackberry users can Unsubscribe.com even while their Blackberry is offline, or not in a service area.

Unsubscribe.com officially launches the app at the 2011 Blackberry Conference on May 3-5 in Orlando, Florida. To download Unsubscribe.com?s app, go to www.unsubscribe.com/bbapp